发明名称 |
LED drive circuit, LED illumination fixture, LED illumination device, and LED illumination system |
摘要 |
An LED drive circuit in which an alternating voltage is input and an LED is driven, and which can be connected to a phase control dimmer The LED drive circuit is provided with an edge detector for detecting an edge of the output voltage of the phase control dimmer; and a current extractor for extracting a current from a current feed line for feeding an LED drive current to the LED; wherein the value of the current extracted from the current feed line by the current extractor is varied in accordance with the detection results of the edge detector. |
申请公布号 |
US8421371(B2) |
申请公布日期 |
2013.04.16 |
申请号 |
US20110987193 |
申请日期 |
2011.01.10 |
申请人 |
SHIMIZU TAKAYUKI;WARITA HIROHISA;KANAMORI ATSUSHI;MARIYAMA MITSURU;SHARP KABUSHIKI KAISHA |
发明人 |
SHIMIZU TAKAYUKI;WARITA HIROHISA;KANAMORI ATSUSHI;MARIYAMA MITSURU |
分类号 |
G05F1/00 |
主分类号 |
G05F1/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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